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The Interpretation of Sulfur K-edge XANES spectra: A case Study on Thiophene and Aliphatic Sulfur Compounds
- Mijovilovich, Ana (author)
-
- Pettersson, Lars G.M. 1951- (author)
- Stockholms universitet,Fysikum,Kvantkemi
- Mangold, S. (author)
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- Janousch, M. (author)
- Susini, J. (author)
- Salome, M. (author)
- de Groot, Frank M.F. (author)
- Weckhuysen, Bert M. (author)
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- (creator_code:org_t)
- 2009-03-03
- 2009
- English.
- In: The Journal of Physical Chemistry C. - : American Chemical Society (ACS). - 1932-7447 .- 1932-7455 .- 1089-5639 .- 1520-5215. ; 113, s. 2750-2756
- Journal article (peer-reviewed)
Abstract
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- Sulfur K-edge XANES has been measured for three sulfur model compounds, dibenzothiophene, dibenzothiophene sulfone, and aliphatic sulfur (DL-methionine). The spectra have been simulated with Density Functional Theory (DFT) using a number of methods, including the half core hole approximation. Dipole transition elements were calculated and the transitions were convoluted with linearly increasing Gaussian functions in the first 20 eV of the near edge region. In the case of dibenzothiophene, relaxation of the first excited states in the presence of the core-hole gave a further improvement. The theoretical results reproduce well the features of the spectra and give insight in the relation between geometric structure and molecular orbitals. Though DL-methionine and dibenzothiophene show a similar sharp rise of the white line, their molecular levels are quite different, pointing out the difficulties in finding useful “fingerprints” in the spectra for specific compounds.
Subject headings
- NATURVETENSKAP -- Fysik -- Annan fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Other Physics Topics (hsv//eng)
Keyword
- Chemical physics
- Kemisk fysik
- kemisk fysik
- Chemical Physics
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- ref (subject category)
- art (subject category)
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